Resigning gracefully is an important part of sportsmanship. It shows your opponent respect
It depends on how you live chess.
Those who look at the chessboard as a kind of combat cage do not give up on principle.
Those who follow their coach's recommendations to continue until the end ( even if the situation is compromised ) because in this way they can acquire the right predisposition to catch every opportunity that arises, do not resign.
Those who think that continuing even in lost conditions is a useful exercise to enhance their defensive skills, do not resign.
Those who are interested in the result do not resign, they hope until the end because mistakes are part of the game. And maybe they're in a lost position because they were the first to make a stupid blunder, so they can legitimately hope that their opponent will do the same...
There is no disrespect in this. It's not very "chivalrous", but it's not disrespectful. Disrespect is insulting, or cheating, for example.
Sportsmanship is accepting defeat, of course, but what does defeat mean ? The rules say that the game ends when one of the two gives checkmate, not when he reaches a winning position. There are rules made specifically for drawing even in a scrambled position ( stalmate, triple repetition...). And unless you're a high-level chess player, the probability of a blunder is never zero. Especially online, where you can play even while queuing at the post office, or during your coffee break with all your colleagues talking around and distracting you.
Everyone has their own way of looking at things. The point is that, as someone has already pointed out, no one can impose his chess creed on others, for example by "punishing" (???) those who do not conform to his idea, which he thinks to be the only valid one. When two people meet in front of a chessboard, the only rules they have to observe are the Rules of the Game. If he plays correctly ( no stalling etc. ), everyone can play as they want.
#1 Ironically if my opponent were to promote 5 queens I'd gladly continue without resigning cuz there's a high probability of stalemate lol.