Is the need to issue bonds a telltale sign that the company would have a hard time paying coupons?

Apple is currently the most valuable company in the world by market capitalisation and it has issued bonds for instance. Amazon have also issued bonds in the past as have Google.

One of many reasons companies may issue bonds is to reduce their tax bill. If a company is a multinational it may have foreign earnings that would incur a tax bill if they were transferred to the holding company's jurisdiction. The company can however issue bonds backed by the foreign cash pile. It can then use the bond cash to pay dividends to shareholders.

Ratings Agencies such as Moody's, Fitch and Standard & Poor's exist to rate companies ability to make repayments on debt they issue. Investors can read their reports to help make a determination as to whether to invest in bond issues. Of course investors also need to determine whether they believe the Ratings Agencies assesments.

It (usually) is better to use Other Peoples Money (OPM) than your own. This is something that Donald Trump has mastered. If you use OPM and something goes wrong you can declare bankruptcy and wipe out that debt. The Donald has done this more than once.

At the fantastic low Intrest rates a company would be wasting resources if they only used their own money.

One more scenario is when the company already has maturing debt. e.g Company took out a debt of 2 billion in 2010 and is maturing 2016. It has paid back say 500 million but has to pay back the debtors the remaining 1.5 billion. It will again go to the debt markets to fund this 1.5 billion maybe at better terms than the 2010 issue based on market conditions and its business.

The debt is to keep the business running or grow it. The people issuing debt will do complete research before issuing the debt.

It can always sell stock but that results in dilution and affects shareholders. Debt also affects shareholders but when interest rates are lower, companies tend to go to debt markets. Although sometimes they can just do a secondary and be done with it if the float is low.

People borrow money all the time to buy a house. Banks will lend money on one (up to 80%, sometimes more), because they consider it an "investment."

If you own a large company and want to expand, a bank or bond issuer will first look at what you plan to do with the money, like build new factories, or whatever. Based on their experience, they may judge that you will earn enough money to pay them back. If you don't, they may "repossess" your factories and sell them to someone who can pay.

As protection, you may be asked to "mortgage" your existing company to protect the lenders of the new money. If you don't pay back the money, the lenders get not only your new "factories" but also your existing company.