We were solving the problem with secondary market and without blockchain can't do that - if you sell tickets from primary organiser - nobody knows what's happening with it.
Now primary market - $30bln. Secondary - $9bln. - Just imagine, blockchain will fastly impact 1/4 of all market, primary sellers are waiting for the solution.
Also, blockchain makes a lot of good things to ticket buyer (b2c) - you can always check ticket issuer, conditions, is it true or not.

So, blockchain is important part, it will totally change process of ticket distribution

Anyway, we have post in FAQ about your question.
https://faq.crypto.tickets/crypto-tickets-business-information/why-do-we-need-blockchain