Serious question, why do businesses use Cisco equipment with licenses?

Recently switched over a site which had all cisco gear, including aironets, switches, yada yada.

Unfortunately I can't disclose the costs, but the figures were in the low 5 figures. I was absolutely shocked.

Switched them out to a mix of Ubiquiti and Mikrotik equipment, no complaints and the cost is quite literally 80% less than before. There are other sites running the same hardware for 8 years with no issues.

So my question is, why do companies pay so much for Cisco?