I'll ask you again: how is it more unjust to be deprived of a win than to be deprived of a draw?
Let me rephrase this differently.
Once upon a time, it was realised that there are 5-men positions that could be won, except for the 50-move rule kicking in (I remember it came up during a Timman-Yusupov game). In current parlance, they are cursed wins. This was deemed unfair, and the rule was changed so it was 50 moves, except in certain endings where it was 75.
Just a few years later, more cursed wins, with longer move chains, were discovered. It was realised that the rule as it was just made arbitrary exceptions, and was not fair. So a choice had to be made:
1. Keep the unfair rule as it was.
2. Revise the rule every time a new cursed win was found.
3. Abolish the rule entirely.
4. Revert to the plain 50-move rule.
Obviously, 4 was the choice made. The other options all have more undesirable features (arbitrary, not scalable, open for abuse).
Now, you claim that the existence of cursed wins makes the game less interesting, at least for computer chess, and the cursed wins should be treated as normal wins. In effect, this is option (2) above, but we might as well consider (3) because as technology improves, that's what it'd end up coming down to anyway. Does this make for a better game? I'll argue why I think it does not. You're free, of course, to push for your "Tsvetkov's Chess" that has different rules.
First of all, many of these extremely long wins feature move sequences that are utterly incomprehensible. Is it interesting as a spectator game? Not really.
More importantly, the game-theoretic value of the opening position of FIDE Chess is (almost certainly) a draw. It's possible that this is entirely due to the 50-move rule. We don't know the outcome of Chess without this rule. If it's still a draw, then it doesn't really matter much in the end. On the other hand, perhaps the opening position is really a cursed win. If that is the case, abandoning the 50-move rule makes the game a win for white.
So, what is more interesting: a game where Black's job is to defend the draw and keep White from winning by playing accurately, or a game where Black's job is to hope White makes a mistake, because there's nothing he/she can actually do themselves to affect the outcome of the game?