Well the fishing industry is shafting other UK industry at the moment so why not..
As has already been alluded to fishing is worth 0.1% of our GDP. For every £1000 our country earns, the fishing industry makes £1.
Brexit puts many other industries at risk, financial services is our largest industry sector worth around 22% and manufacturing is next worth around 17%. For every £1000 we earn, almost £400 comes from those two sectors. So we are risking close to 40% of our GDP on those two industries alone, for the sake of the 0.1% fishing industry. Its crazy economics.
A couple of other things to note. The UK fishing industry exports the vast majority of their fish to the EU. So leaving the EU won't help the vast majority of UK fish exporters because we're increasing trade barriers with the EU.
When you negotiate a trade deal, you negotiate access to each others markets. This is how every trade deal works in the world. If we're too inflexible to give access to our 0.1% GDP fishing industry, then why should we give access to any other of our industry? Trade deals are about negotiation, bargaining power and geography. If our fishing industry is so valuable to European fisherman, then we should be able to negotiate something substantial in return. You don't just get access to other markets without giving something, these are basic rules of negotiation.
And finally, my main gripe about Brexit is 99.9% of people who have an opinion on issues like this are not qualified. And I have great experience in international trade & supply chains, economics and EU law, but I include myself in that too. Trade negotiation is a serious skill set and our negotiators really need to know the complexities of every industry and commodity. As well as the financial and environmental pros and cons of giving access to our industry to other countries. What we instead get is politicians who have little to no idea about international trade, posturing over an industry which relies on the single market and is worth relatively very little to our economy in comparison to our other more profitable industries, which it risks.