Good for you but not everyone reacts the same and there are lots of unknowns in families
My parents didnt DIY either, but probate took 4 years, yes that is extreme, 16 beneficiaries, many of which overseas, in armies couldnt be contacted etc etc
It was also over covid so apparently HMRC virtually shut down ( or so it often appeared)
Couldnt sell the property until probate, couldnt get probate without paying IHT, didnt have IHT money without selling the property and round and round it went
No will, another complication. Lots more complications that would take too long to type out
Hopefully none of this applies to OPs situation, Im merely pointing out when people glibly say this or that, there are many issues which can cause delay even with a solicitor working on it constantly.
(this was for a relative that we didnt really see either, not a close relationship as such)