That's reasonable, but particularly in a business context, if Photoshop is helping you make money then Adobe deserves your money as much as anyone else.
Not to mention that if you're a startup and you plan to grow into a large company or get bought by a large company (i.e. all startups) you are going to have to get your house in order at some point.
Not to mention that if you're a startup and you plan to grow into a large company or get bought by a large company (i.e. all startups) you are going to have to get your house in order at some point.