Your use of "lazy" here really comes off as "ableist".

"I can do it, and you didn't do it, therefore you must be lazy, because I certainly am not lazy"

What's lazy is not diving into the reasons that people may or may not do things.

So, you're saying that the person you're responding to is really saying, "Developers are too disabled to write native applications"? No, that's nonsense. "Laziness" is not the reason for Electron applications, but neither does it implicate disability in this context.

Incidentally, I think it's kind of ableist to toss around the concept of ableism this lightly. Disability is a set of concrete barriers which go unacknowledged and a set of real accommodations which go unimplemented. Disability activism entails acknowledging those barriers and implementing those accommodations; it does not entail the idea that everyone is always trying their best and nobody is ever negligent.