That's easy to say, but an SDS is so much quicker and more certain than a combi hammer drill for making holes in walls, that if that is all they can do, that's great. The OP can simply use a screwdriver for screws. I rarely bother with using a drill/driver anyway. For £25-ish, plus the cost of a battery and charger - the OP could buy a Lidl SDS plus battery drill kit, complete with a range of SDS bits. £5 more will buy a set of longer bits - I bought a set of three ten years ago and still working fine where a deep hole is needed.
I see what your saying, but SDS drills aren't very accurate, they are great at smashing through things, and holes where accuracy isn't really required