The negative response you are getting from this is not a sign 9f taking this for granted and you should not take it that way, having to change the IP just to access a site is not too good a thing to do since there are many risks associated with that e.g the risk of getting your details exposed to hackers via cloud flare and also not being able to verify your account since you access the site through proxy IP different from your original IP.
If it is just to visit and browse through the website that is ok accessing with this changed IP, but when it comes to creating an account with Sportsbet, or binance you may have a problem doing that most especially with Binance which is a KYC compliance exchange. Getting the account verified will become impossible since you are from a restricted region so your ID will not be accepted. Sportsbet may likely give you an access but ultimately you will still run into a problem in the future when the casino will demand for KYC verification in the long run, then you may be unable t9 get access to your account and all the balance on it will be locked out. So on a general note, I will suggest you avoid any website that is restricted to your country and focus on those websites you can access without regional restriction.