Their job is to sell vehicles at a profit. Not sure how they would grow "a lot" selling vehicles that are built to be driven off-road over anything anywhere that suck to drive on-road the other 99.9% of their lives. Instead they built a vehicle that can go offroad on 99.9% of trails and still be fantastic to daily drive for 99% of drivers who would choose them.
Jeep sells less than 250K Wranglers per year in the US. The Wrangler isn't offered in China, but it sells less than 10K per year in all of Europe. The market for this kind of vehicle isn't big. Toyota still sells more Camry's in one month in an auto economy that can't get enough SUVs, and Ford destroys them in F-Series sales - close to a million every year in the US alone.
On the other hand, over a million luxury SUVs are sold worldwide every year, almost half of those are in the US alone, and luxury SUVs are extremely profitable. Land Rover's thing has been luxury SUVs that are extremely capable off-road - that's their niche, always has been in the US, their biggest market - even the Defender when it was offered in the US was (poorly) marketed as an upmarket off-roader / fun machine. That's their differentiator - in fact, their 1-800 number was 1-800-FINE-4WD. If they went way downmarket to utilitarian toy like the Wrangler is (never mind Wranglers now cross past the $50K mark easily), they would fail to differentiate themselves against the cornerstone of that segment, and likely would lose money in the process - as they did in the 1990s. Today's equivalent price for a new 1997 Defender reasonably optioned at $34,000 is over $54,000 today. You're telling me you would pay $54,000 for a 2019 version of a 1997 Defender?
As others have said, I'm sorry it doesn't meet with some people's romanticized notions of what a Defender should be. Agree to disagree.