He was basically saying it's generally more effective to spit them out under the stage then gimp, since you survive and in a lot of cases the opponent would break out before you reach the bottom, then footstool jump off of you to rcover while you die thinking "well... ****...". (Well, I think he only meant the first part, but still, it's true!)
Well, It ALL DEPENDS ON THE % AND STOCKS. Saying that it's generally better to spit under the stage is plain Stupid instead of going for the Cyde is Stupid.
If you have a Stock advantage, the Cyde is obvious. If you are on equal stocks but your % is higher than your opponent's, the Cyde is obvious. If your opponent doesn't have multiple jumps and you want to lololololol, spit under the stage or whatever (because most characters that don't have multiple jumps could still get back on stage.
Besides, For the opponent to be able to break free and Foot stool you, you have to had Inhaled at least the height of the Platform in SmashV. (and in cases like DDD's, it's better to let them break free because it means a free FootStool for you).
Kirby is all about match ups. He has "lol" ones and "Disconnect Controller to be More Effective" ones.