Honestly, I'd be a little more concerned about your ability to comfortably ride a race bike than the overall weight limit.

Carbon frames can be every bit as strong or stronger than Al or steel frames. Maybe less so for the super high end where weight is considered a downside. I would imagine you'd be fine on a Emonda SL (with beefier wheels). A lot of the stress on a bike comes down to riding style, being light in the saddle will significantly reduce stress on the bike.

The bigger question is can you realistically get comfortable on a bike with "race" geometry? The riding position is different than most hybrids you're used to, you'll be leaned much further forward and may not have the requisite flexibility in your hamstrings & lower back.