Nope not so. Tech divers come in lots of sizes. Tech gear doesn't really. Some of the kick-assest (?) divers I know are women who weigh about 110 pounds. There is no way that someone that size should be expected to haul doubles or a RB and two or more stages up a ladder. That's an attitude from the dark ages and is probably unwittingly misogynistic. Even a set of small doubles like steel 80s which may be manageable on their own become unwieldy for some when you start adding stages, can lights and so on. "Forcing" a weenie soul to climb a ladder like that is inviting decompression sickness, strained knees, wrenched backs and potentially much worse. A face-plant onto a steel deck while someone is wearing more than they weigh in gear is going to result in serious injury.
From a safety perspective, I agree that there could potentially be a situation where a "feather-weight" might need to get back on the boat on their own, but I would have to stretch to think of a legitimate one. There's almost always going to someone (crew or fellow passenger) who can grab a stage/deco bottle. I suppose in some oddball situation, if there really wasn't anyone, you dump the gear, and go back to get it another day (or claim it on your insurance).
Yesterday, I dove on a wreck that was 215' deep. Double HP 130s, two 80 cf deco bottles, and a 30 pound camera. No way I am going to try to get that all up on my own...I didn't live to get this old by being a dumb-ass.
The same argument applies to people who may have chronic health issues like a bad back, or twisted knees. A helping hand to hoist a tank in or take someone's fins is always a reasonable thing to do.
I should add that I heard a presentation from a researcher at DCIEM a couple of years ago about the importance of remaining quiet for a while (specifically, 71 minutes following a max NDL dive to 70') to avoid an "unearned" hit. For robust tech dive needing a bunch of deco, doing the minimal amount of lifting should be considered SOP.