How do we disable a lead from turning into and opportunity

Is there a was to disable the function that turns a qualified lead into an opportunity?

 In other words, we would like to be able to just click qualify(or create a won button) and enter the result and close it rather than being forced to navigate through the extra steps of the opportunity section.  We are a distributor(B2B) so we use the opportunities for potential and existing customers of ours while the leads function is used for end users that would purchase from our customers that we push to our sales team and then to our customers.

This ultimately would be easier for our sales team to use as well as analyze the leads won vs lost.