From a player’s perspective, the tuck rule was just a technicality. In his mind, is the arm going forward or not, and it wasn’t at the moment, so he feels it’s a fumble. But the letter of the rule spared him.
Same deal with catch interpretation as TheRainmaker pointed out. Or the 4 offensive lineman / declaring ineligible plays the Pats pulled on the Ravens in 2014. They were all correctly ruled by the officials based on the rules in place. But those rules all felt wrong with the spirit of the game, and therefore why the rules were all eventually changed.
Imagine if the Patriots won SB 51 in regulation because they decided to try a fair catch kick. The vast majority of fans and players would have said they won by cheating and exploiting a technicality, rather than fairly.