Developer Stream Q&A February 2022 - in few words

The fundamental role of the suicide missile is to bring the ultimate game victory by gaining battlefield dominance and gain 1.5x Exp

Even if the kill experience brought by the suicide plane itself is eliminated, as long as this behavior can eliminate the opponent’s unit, even if it is a time-delay bomb, it still has meaning.

Therefore, neither the delay bomb nor the elimination of killing experience can fundamentally prohibit such behavior.

In a short amount of time, quickly throwing a suicide time-delay bomb from the battlefield can thwart the enemy’s attack and ultimately lead to victory. Why not do this? Players will still do it.

Yes, however, it would instead be closer to the last effort measure since kamikazes wont be rewarded for wasting their time instead of playing as infantry.
It wouldn´t eliminate all, but it would eliminate a lot of them.

Still, I believe that forcing pilot to return to reload in order to get his exp for the deed would be much better.