No need to be angry at an opinion. Even if you disagree with it. I think you misunderstood me a bit. I wasn't entirely talking about oversized ranges of clothes as you describe them.
Everyone is a different body shape, thin or not. Some slimmer people are short, some beautifully slim, others painfully thin. Some like their legs, others not.
Many people are a fairly ordinary size.
My view was that designs seem to cater for the slim and very tall. And not enough for the 'ordinary' or slightly shorter , slightly bigger person.
Sometimes a tweak here and there eg: ( sleeves on a larger size of strapless design that works well for smaller sizes ) might work.
I don't intend to set up some sort of clothing business and nor am I pitching to anyone to help me to do so.
I am quite happy where I get my clothes from in the UK. I am not oversized I am afraid.
But I feel for anyone who is. And it is a shame that someone who is finds it hard to find clothing to fit, if that is so.
I don't believe that all people who are oversized ( to use your expression) is because they choose to be so. You only have to look at steroids and what they do for peoples weight to realise that medicines are likely to be a one of several factors that can be involved in many peoples issues with weight gain.