Comments about Ronnie's development are a bit unfair in my opinion. As you say, all babies are different. The fact that your baby is doing those things before 5 months is not because you put your phone down and interacted with him. My son didn't sit up unaided until 7 months and didn't walk until 17 months and that's perfectly normal. It wasn't because I was constantly on my phone and not interacting with him and encouraging him. It's just the way it is. Babies are usually able to sit unaided any time between 4 and 7-8 months, so it isn't necessarily the case that Ronnie 'should' be doing it by now. We've seen that Ronnie can smile. Most babies are able to roll in both directions by 6-7 months but I don't think Ronnie is quite 6 months old yet.I'm not one for comparing babies because I know ever baby is different! But my son is 5 months on the 21st and he can sit up unaided, roll back to front and front to back, he smiles and talks to me when he sees me and that because I actually put my phone down and interact with him! I absolutely love playing with him! Makes me so sad that ronnie is nearly 6 months and should be doing all these by now! Grinch would of definitely shown us if he could do these things!
I do think that Hinch appears to have a lot more time and energy for faffing about her house/garage/loft/going out than most mothers with young babies, but I don't think it's fair to relate that to him not reaching milestones early when all babies reach them at different stages and that's natural - it's not something that parents can control.