Most EDC knives aren't hard use end of the world knives anyway. You get a good fixed blade for that.
I carried a Lightning for two months, the knife was fine as a cutter and can handle the double corrugated cardboard that anti freeze comes in. It will hold an edge ok. It handled fine, and the push button on the side with full grip makes it hard to drop after it's out of the pocket and you need the blade. If it needs to be put up, it's gone, one handed, and you pocket it again. No compromised grips where you can't lock your fingers around the handle like side folder knives force you to use.
But, they are as loud as an old General Store screen door banging shut to get the blade in or out. BAM SPROING! every time. This doesn't work for me on the job working retail - and may not for you. Office environments may have their specific PC hazards too. Around the house it was handy, worked fine cutting rubber hose off cars and such.
Why did I stop carrying it? Well, a Microtech has some nice embellishment - they look a lot nicer than an aluminum cast box shaped handle with one coat of paint or whatever, no grip inserts, etc. I moved to a Ganzo 7212 which doesn't startle people and has a classic modern look to its own.
OTF's fragile? Depends, I've seen all kinds of knives break, mostly from abuse they were never intended to put up with. A knife is meant to slice and cut, but some think they are sharpened prybars meant to split rock, open drums, or for entry team work tearing down a hardened doorway. The funny part is that the pro's use some kind of fire ax, tomahawk, or crowbar for that. Not a pocket knife. And certainly not a Swiss Army knife, which isn't the hardest use knife out there, either. But a great cutter, if that is what you use a knife for.
You want to baton firewood with one, you are on your own. They have a place but those who call out they aren't able to take a beating are expressing the obvious. They aren't intended to.