I agree with this statement. If someone invested in my service and something else who competed with mines, this doesn't represent an ethical problem, but just that the investor is interested in the field in general.
This is a statement I appreciate (and that I personally agree with) but that is, well, rational. When things get real, rationality is often forgotten.
It would be easy to take the opposite position if you were to consider that an investment is usually (or supposedly) a product of the investor's passion for your particular business, not necessarily the field it belongs to. It can be seen as the investor saying "we're with you on this, and we'll fight your competition by your side". It's a matter of perspective, and in this case, it is easy to see things from both sides.
All this being said, I love Dalton's honesty, and Ben's post. A ton of ink was used to cover this matter, but the fact is, everyone's happy here.
