Professional artists create art, but also operate like any business-person. Music is sold as a product to customers (fans) for profit. Profit is price minus cost. Price is determined by supply & demand, which has changed a lot in the last 20 years in music obviously, with supply flooded with cheap or free music.
Business is darwinism: Adapt or die. You can be Blockbuster, or Netflix.
It's also true that people often get out of something what they put into it. You've been fortunate to have a strong enough following to keep your business afloat the last 25 years without changing the formula much: write, record, release, tour, & repeat every 2 years, + throw in some social media posts. There's been changes in the content of the main product (music), but it's been the same producer (Warne), less social media presence (marketing) over time to connect with customers (fans), similar merch forumla etc. Maybe it's time to energize things beyond just music content, i'd start on social media including Youtube, since it's free marketing. I remember people really loved "Garage Wine" lol.
Business also has a motto: Nothing ventured, nothing gained. Big changes in touring & your music is financial risk, and risks need to be smart. Much less risk if changes come outside things that cost a lot of money, which is why I suggest change in social media etc. ie: Start your own weekly Youtube show, create contests, or whatever, it could be a lot of fun for you & fans with little risk. Lots of entertainment options out there now, musicians need to "cut through the mix". I'd say embrace the business side with the same creativity as your music.
I think a lot of your product has become you and your personal stories and how it connects with fans. I don't think Hospital Music had such a strong debut because it was your best music, but because of your story around that time, how much you shared with fans, and how everyone emotionally connected with you & that album. You sell music, but you also sell things like hope & belonging. What a wonderful job to have!