It might also be 30 people who know nothing about computers but have an agenda.
The way to get informed votes on technical laws is to carefully and transparently construct councils or committees whose members are technically competent. Give those councils the power to vote on technical laws, binding the main legislature to the result of such votes.
You can't have a voting body without a quorum rule and say it's to allow the subset of the representatives who understand the subject matter to vote. That's unenforceable and will be abused for political purposes far more often than it's used because the few representatives voting are the ones who genuinely understand the proposed law.
Quorum rules are critical for basic sanity in operation of a governmental body charged with voting.
It's a pathetic excuse that they have other jobs, and they can't show up most of the time. A few U.S. States had that sentiment, and what they do is have the legislature meet only a few months every year or two.
There's no reason they couldn't have an online voting system for representatives, either. The intelligence agencies of France and FVEY can't skew the votes by breaking the cryptosystem used for online voting if the voting record is published and the representatives verify that their votes were counted correctly. One barrier to doing this is probably that on some issues, representatives don't want their votes recorded; they want voice votes. (I'm guessing France does that most of the time; the U.S. certainly does.)