Can you substantiate that in any way with any kind of evidence or is it a baseless claim?
If I tip someone well, it's because they've been incredibly attentive, kind, accommodating, etc. As much as possible, I want the tip to brighten their day. The effect is greatly diminished if that money is immediately divvied up amongst the other servers, making the difference to what they bring home negligible.
I've never worked as a server (though I did work at Chik-fil-A in highschool; employees are not allowed to accept tips there), and I did not realize that many restaurants are involved in the handling of tip money, rather than the tips going directly to the respective server.
So, no, that's not what I had in mind.
Why should anyone expect that sort of handling of tips? Not everyone has worked a job involving tips. I didn't. Should I have spontaneously asked one of my server friends "hey, btw, how are tips handled at your job? Like, I suspect that when I tip someone, you know, that money goes to them, because after all, I gave it to that person and not the restaurant and not anyone else, but just in case I'm mistaken, could you tell me what happens with the tip money after I leave it on the table? It's a question that's been gnawing at the back of my mind, and I just had to ask!"
My point being: unless you're a server at one of those restaurants, how would you know that your server doesn't get the tip you left for them? Could you substantiate such a claim?