It's surprising to see such comprehensive lack of empathy for the motivations of other people.
And that is a really surprising statement. On the contrary, I think it shows a great deal of empathy, which is about understanding their motivations, possibly better than they do themselves. Except in some extreme cases (and these are probably rare), D&D is not a pure game, there will be mixes of all the elements in there, whether it's (and these are not exclusive) the three pillars, roleplaying, optimisation, etc.
It's therefore not "bad" in anyway to give power to one's character to overcome the challenges ahead. For example, except again in rare cases, people are not going to make a character which is completely dysfunctional (and at some, if not most, tables, creating a truly dysfunctional character can certainly be a case of being a wangrod and not wanting to participate to the game as played by the other people around it).
Using Floating ASIs does not make you a munchkin, neither does it make you a powergamer. But it is a power option, and if you choose it, it's best that you understand the reasons for your choice, because that one is clear.
To contrast things, let's look at rolling stats, which is still the only default option in the game. I'm not sure how many people are using this, in percentage. There are lots of people who use it for power reasons, because it's the only way in the rules to get really powerful scores, and honestly when you see some creatures out there, it's obvious that it's not being used straight out of the box, it's only being used for multiple rollings until something "acceptable" (i.e. at least one 18 and more if possible). In which case it's usually being described with a "but I was really lucky: (yeah, right, like we are supposed to believe that, but it's another story). But some people also use it (there is a good example in that other thread) to generate really unexpected characters (and by the way, the poster there then realised that he did not want Floating ASIs, because they would just disrupt the unexpectedness of the character). At our tables, we do it for that purpose, but also to counter the "builds" of our few remaining powergamers, as these are always created along the line of perfect ability scores generated by point-buy.
So, as a contrast, although it can be used for power, it's not a pure power option, there are other considerations there. It's not the case for the Floating ASIs, it's just pure power, you can get just as, or actually much more creative using the standard generation methods of the game. But there is that core of "I should be entitled a 16" like anyone, which is a bit the same as with the point-buy "I am entitled as many points as anyone else in the game".
At our tables, no one but the DM and you know your characters and your stats, and even though some might know your class, it's very unlikely that they will know your exact race and possibly archetype. So why care, as long as you're having fun with your character ?