I'm all for variety, but reports on the BMAG (and results with existing ammo at the time) scared me away from the caliber. Big time. I've had 4 x 17HMRs over the years, and for the cost of shooting them..the caliber never really got me excited until I started traveling to shoot gophers. Only then I got back into HMR after selling-off 3 rifles, and only got my current HMR (Marlin 917 with a Rifle Basix trigger) for that purpose. I still don't love it, but buying factory ammo is convenient for these 7-10 day adventures and if you have a year or more to look for ammo deals..you can usually find them.
I hand load .223, and owned/loaded-for .204R for a year too. I do love small, light, fast varmint bullets!

For that reason, and, for the size of farms I frequent here in Ontario, I decided to give 17 Hornet a try. Honestly, it's an impressive caliber if you ask me. I bought a CZ527 Varmint new, and got all the reloading goodies to load for it. Factory Hornady 20gr ammo was sub-MOA right out of the gate, my first batch of hand loads have closed that significantly. Round 2/refinement is lined-up..and waiting on better weather+free time to align.
I don't know if you (the OP) reload or not, but I used to hate when people told me "I should" when asking questions about 17HMR. The truth is..that was good advice, especially for a caliber LIKE .223. So popular that things like used brass is dirt cheap, sometimes free. Component parts readily available, and the caliber itself is pretty forgiving for a new loader. By that I mean small enough to be easy to work, so much load data that you'll get good loads right away, etc. Anyhow, 17 Hornet isn't quite as easy to load for due to size, but not that big a difference either. As to why someone might suggest .223 when you're asking about 17WSM? Well, look at the bullet weights/speeds of 17WSM, then look at the same in 17 Hornet, and also..what's available for .223. My best-shooting bullet weight for 17H is 20gr, and I'm also getting great accuracy results using 35gr. NTX in my .223. (which I tried on a whim) As a result, for me, it's hard to find merit in even looking at 17WSM when I have so many options covered with 17H and .223. SO much flexibility if you're a hand loader, but lots of speed/accuracy with factory ammo in both cases too.