My doing cardio daily (mountain biking or snowboarding) weight is about 205lbs. My comfortable weight lifting and eating moderately is 215lbs. My bulking bodybuilder get winded walking weight is 230lbs. So yes absolutely it is a 20lb+ swing. Its not just about gaining but also losing and maintaining. If I trained like you and ate normal I would be 205lbs. Training the way I like to train can put me as high as 230lbs. My cardio is nowhere near what it would be at 205lbs but from an absolute perspective I am stronger. Also 44 in a month
That weight swing isn't muscle.
But you are correct from a very simple perspective.
Gaining "weight" will make you stronger.
That's why we have weight classes in all weight lifting sports.
Notice how powerlifters are mostly fat.
But i'm sure you will discredit this in some way because you're a fucking moron.