You dont get better at something by not practising it.
All youre doing is making yourself less likely to be able to stay upright when you do unxepectedly hit a loose or slimy surface in August.
Damp roads, mud, ice with crunchy snow on top - yes, practice makes perfect.
You don't get better at riding on smooth, wet ice by practising doing it though - you probably end up breaking a hip/pelvis/arm/whatever instead.
You need friction between tyre and road to control a bike - you can't steer or brake on smooth, wet ice. The only thing you can do is carry on in a straight line and even
THAT is hard to do. It also isn't much help if the icy road has a bend in it and you are going downhill at the time...
I went out on New Year's Day once and had 3 heavy falls on wet ice in less than an hour. I was really lucky not to hurt myself. I decided after that to avoid going out in icy conditions unless I ever got some studded tyres. (I risked it again a few years ago and... crashed!)
I walked to the shops a couple of nights ago and there was so much black ice on the backstreets that I could barely walk across them. Cycling on those would have been
extremely foolish without studded tyres.