There is a big risk that your career stops at that - being a servant.
(1) The track you get on by demonstrating viability in roles of escalating seniority, such as by leaving a Sr. Manager job for a Director job.
(2) The track you get on by having an easily observable or articulable track record of getting important (or at least interesting) things done.
Ruthlessly working "track 1" may rule out "serving" a team (and at the same time rationalizing that by avoiding that "trap" you're "serving" the broader company mission), but that mindset practically rules out progression on "track 2".
Wouldn't it be a small red flag about an organisation if this wasn't the case?
Are the servant tasks even what you want to spend your time with?
I am not suggesting that the answer to those questions has to be "no". But good to think about it.
> Will your next workplace value all the effort you spent that way?
I'd hope so - as it's reasonable to assume that a next role for someone already managing/leading would involve more management/leadership. So yes, skills/achievements/examples in that area should be valued.
> Are the servant tasks even what you want to spend your time with?
It's probably not for everyone; but if someone doesn't want to perform the tasks that (many would say) are necessary to be a good manager/leader, maybe they shouldn't be in a manager/leader position in the first place?
The mentality "what's in it for me" is toxic and shows one is not ready for higher level management in a large org where cooperation is necessary to do anything interesting. Better questions are "is my team working on the right thing?", "does my team have the right skills to deliver on that thing?", "what relationships do we need to succeed?", and last but definitely not least "is my manager competent enough to provide the support I need for my team to be successful?". The last question is the key one: you won't grow if you are reporting to a muppet.
Is it not possible to see yourself as having thought too much about maximizing your companys success without thinking about your own needs?
I wouldnt qualify this as toxic. And they can go alongside if you make it clear for yourself and your manager.
I honestly don't think being too selfless is an adequate explanation for career stagnation though. Selfless behavior will generally help you get ahead in life and in your career, because good relationships matter a lot. However you won't get promoted just because you help everyone. What if you are just servicing the squeaky wheels rather than solving the biggest problem on your plate? A good manager will only look to promote you because you have demonstrated you are capable of solving larger problems. There are other things too: like the business actually has the need for a higher level role. If that's the case, then your behavior is irrelevant—you just need to leave to someplace that does have the growth opportunity.
Overall the reason I said your comment was strange is because it clearly comes from some personal experience you had, but it lacks enough context to be actionable to anyone who reads it. I can think of a dozen different ways I've seen a "servant leader" mentality succeed or fail, but it all depends very much on context. Ultimately if you want to succeed you need to understand what game is being played and not fallback to abstract platitudes.