Hmm ... cannot fully agree with you...
Lets see ...
Playing ToTo is gambling (**addition to quantify, gambling as in
ToTo, 4D, ...etc)? of course it is.. so are a lot of other things.
everytime we do something that had some other things at stake,
strictly speaking, we are gambling with it.
So the question then is, should a Christian gamble?
Lets explore this further, is gambling a sin? if its a sin, then
very straight forward, Christian should not and must not
gamble.
so is it a sin? going further, here is what an indivdual have to
decide...
here is one common reasoning ..
gambling leads to greed, which leads to obsession, which leads to
adiction, which leads the person away from God, and this is a sin
(cause in the end, this adiction become a 'god' to the
adict).
back to the question, does gambling always leads to greed? although
there is a high chance of this happening, it is not
necessary.
Here is my personal opinion;
To say that gambling leads to greed, is the same as saying eating
leads to gluttony. The key here is moderation and self
control.
(to be frank, our work and even our ministries involvement can also
become an obsession which may leads our focus away from God).
Hence, here personal conviction applies
1) So is gambling permissible? probably yes. Is it benefical? most
likely not.
2) Will this cause a weaker brethern to stumble? yes, there is a
high chance a younger, impressionable brethern who lacks
understanding and/or self control may get stumble.
so with these, let each make your own decision based on your own
conviction, whether you want or you don't want to do it.
cheers ... 
