There are two parts involved here: 1) prevent the battery from exploding? This it should do. 2) Prolong battery life? This requires not charging to 100%. I think it's fairly clear why most users don't want their things to stop charging at 75%.
Just change the external scale. 75% is now 100%. Users are none the wiser and battery life is prolonged.
Or maybe they'll buy the competing product that has 25% more runtime, or is 25% thinner, or is 10% cheaper etc.
Most smart battery chargers do this. 0% is not really 0% and 100% is not really 100%.
Then your competitor with the same battery cells says 85% is the new 100% and now they have longer battery life than you do.
And then maybe your competitor gets an announcement on every plane reminding people not to buy their product :-)
No, because again, this is not about preventing batteries from exploding. They already shouldn't explode. This is purely to give them a longer lifespan – which is not that attractive to producers, who I assume want to sell more batteries.