Yes.
That's kind of the point of the index being the weighted average market capitalization.
I need to stop you right here. Investments aren't for everybody, especially when you do not tell the downsides of it but instead mention simply that
The beauty about DCA and investing in diversified ETFs is that you don't have to be 'good at investment' or worry about 'when the market will crash'. You simply get above average performance at a low cost.
You cannot predict it but you
do need to worry when the market will crash, especially when the funds will be used for certain financial milestones in life such as buying a house. You're telling me if you're buying a house in the next 5 years and working towards saving for the downpayment and renovations (as an example) you'd recommend putting it in ETFs?
Generally, the longer the time horizon the more favourable the outlook.
Also, what if the average performance for the time period I'm vested is in the negatives? Yeah.. it's still the average but it's not a good outcome. Are there better solutions for the above example? SSB is one for example. Short maturity endowments are another.
More information is always required when you want to recommend someone to invest in something, or get a policy, or to throw it in a safe, capital guaranteed place. You're not doing anyone a favour by oversimplifying investing.
It's the same for insurance policies, as an example, we have to mention the guaranteed and non-guaranteed portions, along with the risk having all of your premiums being lost if you surrender the policy early.