My opinion is that many jobs in marketing and HR are really useless and are mostly concerned with producing/selling more stuff and emplying more people to do so just so that the people working there don't starve, because capitalism I guess. Lots of jobs I see in the programming sector are about HR or optimizing ad performance, SEO and collecting and analyzing data to show even “better ads”.
If we had a basic income nobody would have to produce stuff just for the sake of selling it. It would become easier just to produce the things that are really needed, do the things that you really want, you wouldn't have to be profitable or necessarily better than others in certain ways.
Also, there are still many (partly even subsidised) jobs that are hurting the planet. Producing and selling coal, cars, meat and weapons could all go away in favor of Renewables, automated public transport, vertical farms and veganic agriculture.
Retail is also a sector where more automation and just omission of manual labour could happen. We could have underground warehouses where robots pick up the stuff we order online and then they get sent to us with an autonomous mail robot.