You can believe whatever you want to, but it sounds to me as though you have next to no experience of doing actual work in a garage.
The bottom line is it's a nice looking place but that floor it simply doesn't look very practical. Pictures comparing it to McLarens assembly area are utterly irrelevant, they are assembling brand new cars, not working on old ones and there is a world of difference.
BTW I'm not talking about huge pools of oil etc. just a few drips or oil or coolant could turn a shiny surface that into a skating rink and may not be noticeable until you land on you arse. Also how strong is the shiny surface, will it survive dropping heavy components or tools onto it with no damage?
Many reasons, main ones being It wouldn't stay clean for long. Be damn slippery with any minor spill which face it, it's not high on your priority list to wipe it up when you have a gearbox for example almost out. I didn't always place my tools or parts on the floor either which would no doubt damage the tiles. I've seen many others handle heavy tools in the same way & just dropped them.
OMG, can't believe you're still arguing against having a nice garage floor?
Let me settle this once and for all.
Do either of you have a similar garage floor ?
If the answer is NO then you're not in a position to state fact. You can speculate as much as you're doing, but its just speculation as you don't own, you're just assuming. I on the other hand am able to state FACT !
As you've probably read above, i'm Mr Spill !!!! Yep, everytime i take that a sump bolt out, no matter how good i am with positioning of the collection pan, i always manage to miss it a little. Is it a problem? Again its NO BIG DEAL. So please stop being a pair of smartasses thinking you know better? I do not break bones every weekend all because of my floor. I've never once slipped on it. Yes I have managed to scratch it, but that was entirely my fault, when i dropped my ducati off its paddock stand, and the foot peg scratched some of the finish off.. Fortunately for me, it was an easy repair. A bit of pewter spray, and you'll never know its there. most importantly the Ducati came away unscathed. As for other tool drops less than 300lbs, its survived without issue. Yes i probably do take a little more care of the finish. But all it takes is some protection example, putting a mat under axle stands and what not. ! The bottom line is its a VERY durable surface. I do not carry a trolley jack to the car, it gets dragged across the floor and it DOESNT destroy it. Simply put, its as good as any other garage floor, if not better, giving the keeping it clean advantages it holds.
Until you own a similar garage floor, i suggest you take the advice of people that have, and are actually able to confirm its durability and ease of use.
Anyway moving back to topic, this weekend, i hope to be doing some valve clearances on my Kawasaki KLX. (if time permits) I shall be NOT taking any extra precaution for any oil or fuel that may find its way onto the floor, as i know its a piece of cake to wipe it up afterwards.