There's probably no objective truth, but let me offer a perspective: a founder sees 1 founder (themselves) and 100 VCs and a VC sees 100 founders and 1 VC. In the same way you look for patterns in founders, teams, products and markets to determine who to invest in, founders look for patterns in VCs to see who's likely to invest. A useful and common pattern founders pick up on is VC tire kicking: the ones who are interested enough to dig in but not excited enough to invest immediately. Asking questions in a meeting is one thing, but following up in an e-mail with an itemized list of; "how do you think about [x], what about [y] competitor, have you thought about [z]" is a surefire indicator that an investor's not willing to move right now (not enough confidence in founder, team, product or market) and, as a founder, you need to move on.
So you may sit here and proclaim, "hey, this advice isn't accurate, because I ask questions when I'm interested!" Well... yeah, sure. There's (1) selection bias involved, you're a well-known VC and you're likely meeting with, on average, more experienced founders (by the time a first-time founder gets to you they may have been through an accelerator, faced tens of rejections or more, etc.) and this can lead to more mature relationship building, and (2) for every 1 in 100 founders you invest in this way, you passed on the other 99, making you one of their 99 they need to pattern match and learn from.
Viewed through this lens, founders should absolutely take this advice to heart. If you, as an investor, really wanted to invest in a founder and they snubbed you a bit after a follow up question (not rudely, they just have to choose where to focus), would you suddenly lose interest, or would you pursue a great deal / great opportunity? I have a hard time believing you'd let somebody you thought was the next Zuck walk out of the room without a term sheet. Founders should try to find the investor who thinks they're the next "Zuck", or some reasonable facsimile of such given the product and market.
Hope that helps clarify. I've seen friends put through the ringer by getting too caught up in the weeds with VCs that clearly weren't interested, or were tire-kicking. Can happen to amazing founders and it's wildly distracting.