I think most orchids not being scented is not true. Maybe you think of orchids as commonly sold hybrid phals at grocery stores and such, then maybe one would think that.
Many of cattleyas, oncidium and its intergenric hybrids, dendrobiums, miltoniopsis, cymbidiums, all scented with varying degree.
I have over 100 orchids and almost all of them are fragrant. The exceptions are again, the hybrid phals, most of my lady slippers, a few oncidium hybrids.
and as some members already point out, fragrance is often lost in the breeding looking for the "look" first. The ones without any fragrance usually make up for the loss with their colorful and beautiful flowers.
I'm happy with (almost amazed by) how beautiful my non-scented phals, oncidium hybrids and lady slippers are!
---------- Post added at 10:57 AM ---------- Previous post was at 10:54 AM ----------
If you like strongly and sweetly scented orchids, why don't you look into miltoniopsis?
I understand they are fairly popular over in UK as the climate suits them, although I am not familiar with the particular climate of your region.
They come out a lot in the spring through summer, spring being the main season here.
They have long lasting (2 months) big colorful flowers too.
I'm including a picture of them, a sample, to entice you into them
Are't they beautiful?