Yes, it's treatable with antibiotics and people that are treated get less sick. As stated in the article, prophylactic treatment with Doxycycline is the standard of care. Testing the tick is an alternative to that rather than something that should be expected to increase treatment...

The article also mentions that symptoms sometimes persist after treatment with antibiotics.

It also has the broader public health benefit of reducing the preventative use of that class of antibiotics, which lowers the risk of antibiotic resistance generally. (In an ideal world we'd never use them preventatively.)

Could be a very big deal if it could be made properly inexpensive. COVID tests were, after all.