Yokwe,
Here is a link to a short article from the American Cancer Society - perhaps you can talk to your doctors about this and ask for their thoughts. Alternatives that are placed into the bladder like BCG are named. These are chemotherapy drugs, not immunotherapy drugs like BCG.
Always there are pluses and minuses. Talk to the Docs, see if using such drugs might allow you to have early treatment soon after TURBT. You can search the drug names for more info.
Do make sure to ask why chemo drugs have not already been offered as a possibility. You and your care team know your situation best.
You really don't want to let the cancer get to be invasive.
www.cancer.org/cancer/bladder-cancer/treating/intravesical-therapy.html
Best,
Jack