1) On the open ocean, what is there to even avoid? In the harbor, you often don't have a choice; the harbor master is going to _require_ you to pick up a harbor pilot who is rated and certified for the harbor you'll be in and they must be in command of the ships steering and propulsion in order for your ship to even enter their waters.
2) Only 20% of the global merchant fleet is dedicated to shipping. The two other major types of ships, tugs and passenger ships make up most of the rest and neither of these are exactly suited to this technology.
3) Over 50% of the ships in use right now are more than 15 years old. Yea, a new one is _only_ $200 million, but that washes over the real economic picture of ship ownership and maintenance and the likely market for this product.
4) Most ships are not giant Maersk style super-container ships, so staffing reductions aren't likely to be a huge win here, if at all. Ships already run with the _minimum_ crew necessary, usually determined by already established maritime laws and agreements.
5) Microphones and pictures are nice, but ships have actual radar; why not just use that and skip all the fancy "sensor fusion" and off-brand retrofitting?