It's a matter of focus.
本句是常用口语. It's a matter of …这个句型经常被用于一些固定表达中,例如:It's a matter of opinion.(萝卜白菜,各有所爱).It's a matter of time.(这是迟早的事).
The point is, it takes many adjusements to bring the subject into focus.
The point is…在写作中是一个常用的句型.可以用来引出段落或全文的中心观点句,常用在论说文中.该表达能引起读者的特别注意.