I presume they’re thinking about electricians’ and heating engineers’ jobs. Seems a bit over the top though because no-one’s forcing you to use the service (i.e. this is not the kind of problem that affects people who object personally) and because there are already online services which act as a proxy to help you find people to do jobs at home which have not led to a slew of domestic gas explosions (i.e. this is not the kind of problem that is likely to have a big effect on society)