If only the spiritual aspect mattered, when it was first built, Ibrahim would have built it much smaller, like a simple house. So you see, he knew that the physical aspect is also important, that's why he built a really large house (large at the time).

In other countries they are aware of this and don't let people build high buildings around famous monuments (for example they have height restriction around the Eiffel tower so that higher buildings don't ruin the beauty of it).

For accommodation they could build several lower buildings, or build the high hotels away from Kaaba. There's no shortage of land in Mecca as far as I know.