Sorry to sound patronising, sometimes it's easy to slip into thinking that intelligent design seems so obvious that anyone who denies it must be suppressing the fact of it.
That gravity was a force pulling us towards a planet seemed so obvious that people accepted it, and because it worked in most situations it took some time for a better explanation to arise. Intelligent design intuitively makes sense until anything more than a cursory glance at the detail, but the patronising bit isn't about making the claim, it's about the assertion that deep down we know this really, and we're just being recalcitrantly childish about it.
Rain wouldn't be possible if the earth wasn't the right distance from the sun - it would either be ice or vapourize.
And how many billions of planets are there out there at varying distances from various types of star with various elementary compositions... enough that there many only be a few billion planets out there in zones where liquid water is viable? Just a few billion, maybe?
Shall we say it has the appearance of having been designed ('made' prompts the question of how, which I don't know)?
Shall we say, instead, that there's nothing inherent to it which precludes design, but equally nothing which leads to the conclusion?
The alternative would be that it wasn't designed but came about by chance, which is fine if it were just one aspect, but there seem to be countless examples of apparent design.
And billions upon billions of opportunities for those combinations to come about in the universe, even before we start to consider the possibility that this might not be the only universe out there.
Really the only reason I can see for not believing in a designer is that we can't see one.
Really, the only reason I can see for thinking there's a designer is because you have to try to maintain some link to an old book of fairy stories that's had its day.
O.