Imagine, a small hits a satellite and the satellite sends out a shitload of shards moving at extremely high speed. And then some of those hit a sky data centre and cause a cascading (
Kessler) effect. Of it the meteor hits the much larger data centre directly. We already know we are walking a fine line of losing a significant proportion of satellites if there are collisions.
Or worse, what if some bad player shoots a missile into one of those centres? This would cause orders of magnitude worse results than a simple collision. If a cloud of debris started orbiting, it could knock out a large portion of the world's computing power (assuming most adopted this silly idea). If most of the data centres were put in space and that worst case scenario happened, the whole world would shut down. And if you moved the centres far enough apart in space, they would be so high up the communications lag would have just as bad a consequence.
For shit like this, you have to plan for worst case. It's why they put berms around terrestrial data centres and have enough security to protect a gold repository, just about. Right now, there is no way to protect against a Kessler Syndrome/Effect/Event if it happens.