Well some jobs are shitty but some one needs to do them . Economic incentives help in making sure someone does them.
Richer a country becomes lesser people in that country want to do those jobs, it is true even here in the U.S. most of the jobs illegal immigrants do, have few takers
in the legal job market .
FAANG outsource the ugly work to other companies , for example watching flagged video content is one worst jobs out there , most of this is not done in-house . Many of the service jobs in their campuses are done by staff not on their payroll, who don’t enjoy the same benefits . Even for pure tech roles they use contract staff in good amounts who don’t necessarily get the same benefits .
There are good reasons for this Facebook is not expert at say building a good team of security guards and they should perhaps leave it to experts
The point remains someone got to do these jobs , it does not mean UBI should not happen. Localised implementations mean these problems have to studied and solved for .
The drive to automate jobs increases when average pay is higher , for example you will find a lot more cooks, maids and security (gatekeepers) in developing countries in wealthier economies you will find more roombas, more home automation etc.
There is no incentive for self driving in say India , economically it won’t make sense given cheap availability of labour . Self driving is going to replace millions of jobs in the U.S. the upfront investment all the big companies are doing will not make economic sense if labour was cheaper.
UBI will increase the standard of living which in turn drives the need to automate making UBI more needed as lesser jobs are out there etc.