But think about McDonalds. The food is grown by "farmers", the buildings were built by construction workers, the people who work there were taught by teachers, and the food was created by scientists.
Some, but not all, of those people are doing meaningful work.
Now consider the banker that renegotiates mortgages with long time customers to help them stay solvent, the politicians who stand up for constituents, the salespeople who help people find a car that will really serve them well, the lawyer that takes a pay cut to defend the accused...
Meaning is not found in what you do, but how you do it.
Heck, if it weren't for banks we'd probably live in some kind of Jane Austen world where the vast majority of the land is owned by a few super-rich families and the folks who don't inherit money have no way of getting ahead.
Maybe you were being ironic and I just took you too literally!
It's the difference between someone who INVENTS a medication, and someone who collects 5% fee any time you PURCHASE the medicine. Sure, the pharmacists might go on and on about how they are helping people, but really it's the chemists that are doing the hard work that ultimately are the ones improving your life.
There are genuinely useless, parasitic, and net-negative people out there, but none of the proposed examples (bankers, pharmacists, Google) falls into this category.
And science and teaching are only possible because of the economic surpluses generated by trade, which is again, facilitated by banking. Teachers don't work for free! If anyone threatens their final salary pensions they go on strike!