I don't have to? I think we have a different definition of "right". I can justify doing lots of things I don't have a right to, like "going to a store". I don't have a right to go to a store, it's a voluntary transaction the store owners can choose not to participate in if they want. If I had a right to it, that would mean that the store owners would be violating my rights by refusing or not existing.
That's not what rights mean though. If a store exists and is open for business, you absolutely have a right to go there to shop legally (you don't have a right to go there when it's not open, or to just steal stuff, or to loiter, etc.).
This interestingly is part of the problem of "rights" language. For example, the "right to education" or "the right to health care." Those rights don't mean that there will magically be supply of those things for you to obtain. The "right" to shop, to health care, to education, to vote - means that you cannot be restricted from those things by "unfair" criteria.
There may be rights issues with the criteria, but it's an important distinction!
Here's a trivial example: is it a rights issue if there is a store that has one Widget for sale and two people want to buy it, and both have enough money. Is it a rights issue if you let one person outbid the other? What if instead of making "highest bidder" get the limited resource, you use a random lottery at the initial lower price?
How would you feel if this applies to health care? Education? Access to internet? Housing?